---
title: HumanBodyPose3DObservation.EstimationTechnique.reference
framework: vision
role: symbol
role_heading: Case
path: vision/humanbodypose3dobservation/estimationtechnique/reference
---

# HumanBodyPose3DObservation.EstimationTechnique.reference

A technique that uses a reference height.

## Declaration

```swift
case reference
```

## See Also

### Getting estimation techniques

- [HumanBodyPose3DObservation.EstimationTechnique.measured](vision/humanbodypose3dobservation/estimationtechnique/measured.md)